Calculadora de Fórmula Empírica
Determine a fórmula empírica de um composto a partir dos percentuais de composição elementar.
Ratio of A (divide by smallest)
1.00
Ratio of A (divide by smallest) vs Mass of Element A
Formula
## How to Find the Empirical Formula ### Steps 1. Convert mass of each element to moles: **moles = mass / atomic mass** 2. Divide each by the smallest number of moles 3. Round to the nearest whole number to get subscripts
Exemplo Resolvido
A compound has 40 g C and 6.7 g H.
- 01Moles C = 40 / 12.011 = 3.33
- 02Moles H = 6.7 / 1.008 = 6.65
- 03Divide by smallest (3.33): C = 1, H = 2
- 04Empirical formula: CH2
Perguntas Frequentes
What is an empirical formula?
The simplest whole-number ratio of atoms in a compound. For example, glucose (C6H12O6) has empirical formula CH2O.
How is empirical different from molecular?
The molecular formula is a whole-number multiple of the empirical formula. You need the actual molar mass to find which multiple.
What if the ratios are not whole numbers?
Multiply all ratios by the smallest integer that makes them whole. For example, 1:1.5 becomes 2:3.
Aprender